Not sure how complex this might be to implement, but it might be good to look into fixing the issue of:
If I’m logged into say piefed.social and I see a link on another forum to a post on piefed.ca, when I click on it I’m not logged in, and then I can’t upvote or comment.
Meaning I need to go to piefed.social and search for that post if I want to interact with it, which is a lot of friction.
Perhaps if you go to a piefed.ca post it can look at your cookies to check if you’re already logged into another piefed instance, and then redirect & open the post through the instance you’re logged into.
Or have a big redirect button that offers to redirect you to the post you’re looking at but in the instance you’re logged into.
Mastodon solves this by offering to redirect you to the active post on another instance. I guess a similar solution would apply here, though I have no idea how technically challenging it would be to implement or if it’s really necessary here. I very rarely if ever find myself in the “wrong” instance.